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First‐principles study of the structural and magnetic properties of cubic and amorphous phase‐change materials doped with 3d impurities. We find that Co‐ and Ni‐doped Ge2Sb2Te5 is non‐magnetic, whereas Cr‐ and Mn‐doped Ge2Sb2Te5 is magnetic and exhibits a significant magnetic contrast between the two phases in the ferromagnetic configuration. These results are explained in terms of differences in...
Ab initio simulation of the transition from the crystalline to the amorphous phase of a phase‐change material doped with Fe impurities. The structural and magnetic properties of both phases are studied and a link is provided between the magnetic contrast recently observed in these materials and the drastic change in local order which occurs during amorphization.
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